River Crossing, Alaska

Dillinger River, April 17, 2010
"Despite my best efforts, my leather ski boots got soaked by the melting snow," says Andrew Skurka, who tried to leap across some creeks and rivers. "At night everything froze solid. In the morning I had to force myself to slip my feet into the icy boots."

See more pictures from the March 2011 feature story "Circling Alaska in 176 Days."